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sonicblaster
Member Since: 17 Dec 2021
Location: Herts
Posts: 7
 
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| crankshaft/engine failure |
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I've not long had my Discovery 4 (>100K miles). Having read on the forums about crankshaft/engine failure I'm somewhat regretting my purchase now and thinking of part exchanging already. The car is fine at the moment but don't fancy an engine failure on smart motorway or a dangerous road? What does everyone think about this risk? Is it a massive problem?
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 5th Jan 2022 10:11 am |
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grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6405
 
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realistically it can happen to all vehicles
my mates Focus blew up on him big at 80 Mph on M4 trashing motorway with bits of engine
think what is percentage of cars which failed
there are only so many modern cars which last long time
use good service routine on the motor and I guess should be OK
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| 5th Jan 2022 10:16 am |
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G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 560
  
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If you’ve already bought the Discovery, I think you’d be lost without it. They are very hard to replace, there isn’t anything else out there that offers similar capability and use.
Unfortunately, they do come with a risk. However, if yours has already covered 100k without an engine replacement- your already into the better luck side of things.
The issue is down to the oil - I believe it’s due to the long service intervals. Change the oil every 8-10k miles and I think that’ll help reduce the risk significantly IMO. Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
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| 5th Jan 2022 10:17 am |
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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10808
 
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Has the car a full, properly documented service history?
Have the belts been changed, and maybe the oil pump?
I agree entirely with G3Z - I change my oil & filter mid-way between services, except recently as mileage has been severely limited due to CV19 
Good luck.
NJSS
Last edited by NJSS on 5th Jan 2022 10:24 am. Edited 1 time in total
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| 5th Jan 2022 10:22 am |
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grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6405
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i second that
D3/4 is really hard to replace with similar capabilities car, very hard
G
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| 5th Jan 2022 10:23 am |
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sonicblaster
Member Since: 17 Dec 2021
Location: Herts
Posts: 7
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Good advice everyone, thanks. Yes has been meticulously maintained, belts and w/pump done. It is very practical of course but I guess any car can lose power on a motorway etc.
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| 5th Jan 2022 10:56 am |
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Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6910
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I think maintaining the level towards high rather than running close to the lower level mark is also something to keep an eye on. Joined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
Convoy for Heroes 2011
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| 5th Jan 2022 11:14 am |
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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10808
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Quote:Yes has been meticulously maintained, belts and w/pump done.
It's the oil pump which is critical, water pump failure is a major problem, but it doesn't wreck the engine in seconds!
I have owned numerous LRs almost continuously over 55 years and have only once had a failure which precluded me from finishing my journey - a failed high pressure fuel pump.
NJSS Am I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
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| 5th Jan 2022 11:36 am |
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Devon Z
Member Since: 14 Nov 2019
Location: Brixham Devon
Posts: 251
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Dave T wrote:I think maintaining the level towards high rather than running close to the lower level mark is also something to keep an eye on.
Run mine always between normal and max and check regularly, do oil and filter twice a year and using an oil stabiliser which prevents dry starts, engine runs much quieter and smoother from cold.
If your concerned about the engine does yours have an auto box? There’s another story.
I’ve stopped worrying I just do my best to prevent it. Steve
*2005 RR Sport 2.7tdv6 HSE. Current project.
*98 Volvo V70R FWD, owned 14 years, future project.
*99 BMW Z3 30k miles owned from new.
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| 5th Jan 2022 11:58 am |
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popsdosh
Member Since: 09 Nov 2009
Location: cambs
Posts: 442
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Having had the issue it is purely down to luck . Nothing to do with service intervals or changing oils .I know I will get shot down but there are issues changing oil more regularly than you need to especially with modern synthetic oils. I was in that camp until they were pointed out to me.
The crank snaps due to a weakness on a journal ,it just happens no warning apart from vibration on acceleration just before it shuts itself down due to the oil pressure drop from all the swarf in the filter. Sadly the D4 was just a step to far for that engine ! It has been fitted trouble free across many vehicles all over the world and still is, even in D5s today .
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| 6th Jan 2022 8:12 am |
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sonicblaster
Member Since: 17 Dec 2021
Location: Herts
Posts: 7
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Great advice all around thanks! It's a shame that it's so hard to figure out how common this kind of failure is compared to other vehicles. I know BMW have their fair share of timing chain issues on some engines for example. Not sure I'll keep it now as I'll always have that in the back of my mind when driving.
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| 6th Jan 2022 2:10 pm |
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Liam
Member Since: 07 Feb 2015
Location: Rotterdam
Posts: 72
 
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I have owned our 2015 d4 sdv6 for 4 years and driven it from 60k to 142k kilometers with no major issues. Actually one of the most reliable cars I’ve owned so far. Regular maintenance with a reputable Indy.
However last week, without warning it ate its crank while travelling at 80 mph on the German Autobahn back from our holiday.
Fortunately I was able to coast to a parking space, leaving my family safe as we awaited recovery.
I’m now split between repair or replacing it with a slightly used disco 5 as our family hauler. Difficult decision, as a newer car will come with 2 years warrantee etc, while on the other side we all love our d4 family tank.
My Indy has had to replace several 306dt engines for the same problem, so I am sure he will do a good job.
Anyone here have any experience moving from a d4 to a d5? In the mean time the 2006 td5 110 weekender will get some more family use.
On another point; as a previous poster mentioned, 306dt engines aren’t the o my failing engines in the world. Last year I had my BMW n54 engine eat its main bearing, also requiring an engine replacement to remedy. Just my luck 🍀 I guess  2015 Discovery 4 SDV6 HSE - Montalicino Red
2006 Defender 110 TD5 - Santorini Black
1991 Porsche 911 - Guards Red
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| 14th Jan 2022 9:40 pm |
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